Sith/counter/views.py

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from django.shortcuts import render
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from django.views.generic import ListView, DetailView, RedirectView
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from django.views.generic.edit import UpdateView, CreateView, DeleteView, ProcessFormView, FormMixin
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from django.forms.models import modelform_factory
from django.forms import CheckboxSelectMultiple
from django.core.urlresolvers import reverse_lazy
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from django.contrib.auth.forms import AuthenticationForm
from django.http import HttpResponseRedirect
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from django.utils import timezone
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from django import forms
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from django.utils.translation import ugettext_lazy as _
from django.conf import settings
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import re
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from core.views import CanViewMixin, CanEditMixin, CanEditPropMixin
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from subscription.models import Subscriber
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from counter.models import Counter, Customer, Product, Selling, Refilling
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class GetUserForm(forms.Form):
"""
The Form class aims at providing a valid user_id field in its cleaned data, in order to pass it to some view,
reverse function, or any other use.
The Form implements a nice JS widget allowing the user to type a customer account id, or search the database with
some nickname, first name, or last name (TODO)
"""
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code = forms.CharField(label="Code", max_length=10, required=False)
id = forms.IntegerField(label="ID", required=False)
# TODO: add a nice JS widget to search for users
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def as_p(self):
self.fields['code'].widget.attrs['autofocus'] = True
return super(GetUserForm, self).as_p()
def clean(self):
cleaned_data = super(GetUserForm, self).clean()
user = None
if cleaned_data['code'] != "":
user = Customer.objects.filter(account_id=cleaned_data['code']).first()
elif cleaned_data['id'] is not None:
user = Customer.objects.filter(user=cleaned_data['id']).first()
if user is None:
raise forms.ValidationError("User not found")
cleaned_data['user_id'] = user.user.id
return cleaned_data
class RefillForm(forms.ModelForm):
error_css_class = 'error'
required_css_class = 'required'
class Meta:
model = Refilling
fields = ['amount', 'payment_method', 'bank']
class CounterMain(DetailView, ProcessFormView, FormMixin):
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"""
The public (barman) view
"""
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model = Counter
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template_name = 'counter/counter_main.jinja'
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pk_url_kwarg = "counter_id"
form_class = GetUserForm # Form to enter a client code and get the corresponding user id
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def get_context_data(self, **kwargs):
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"""
We handle here the login form for the barman
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"""
if self.request.method == 'POST':
self.object = self.get_object()
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kwargs = super(CounterMain, self).get_context_data(**kwargs)
# TODO: make some checks on the counter type, in order not to make the AuthenticationForm if there is no need to
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kwargs['login_form'] = AuthenticationForm()
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kwargs['login_form'].fields['username'].widget.attrs['autofocus'] = True
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kwargs['form'] = self.get_form()
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if self.object.type == 'BAR':
kwargs['barmen'] = Counter.get_barmen_list(self.object.id)
elif self.request.user.is_authenticated():
kwargs['barmen'] = [self.request.user]
if 'last_basket' in self.request.session.keys():
kwargs['last_basket'] = self.request.session.pop('last_basket')
kwargs['last_customer'] = self.request.session.pop('last_customer')
kwargs['last_total'] = self.request.session.pop('last_total')
kwargs['new_customer_amount'] = self.request.session.pop('new_customer_amount')
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return kwargs
def form_valid(self, form):
"""
We handle here the redirection, passing the user id of the asked customer
"""
self.kwargs['user_id'] = form.cleaned_data['user_id']
return super(CounterMain, self).form_valid(form)
def get_success_url(self):
return reverse_lazy('counter:click', args=self.args, kwargs=self.kwargs)
class CounterClick(DetailView):
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"""
The click view
This is a detail view not to have to worry about loading the counter
Everything is made by hand in the post method
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"""
model = Counter
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template_name = 'counter/counter_click.jinja'
pk_url_kwarg = "counter_id"
def get(self, request, *args, **kwargs):
"""Simple get view"""
self.customer = Customer.objects.filter(user__id=self.kwargs['user_id']).first()
if 'basket' not in request.session.keys(): # Init the basket session entry
request.session['basket'] = {}
request.session['basket_total'] = 0
request.session['not_enough'] = False
self.refill_form = None
ret = super(CounterClick, self).get(request, *args, **kwargs)
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if ((self.object.type != "BAR" and not request.user.is_authenticated()) or
(self.object.type == "BAR" and
len(Counter.get_barmen_list(self.object.id)) < 1)): # Check that at least one barman is logged in
ret = self.cancel(request) # Otherwise, go to main view
return ret
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def post(self, request, *args, **kwargs):
""" Handle the many possibilities of the post request """
self.object = self.get_object()
self.customer = Customer.objects.filter(user__id=self.kwargs['user_id']).first()
self.refill_form = None
if len(Counter.get_barmen_list(self.object.id)) < 1: # Check that at least one barman is logged in
return self.cancel(request)
if 'basket' not in request.session.keys():
request.session['basket'] = {}
request.session['basket_total'] = 0
request.session['not_enough'] = False
if 'add_product' in request.POST['action']:
self.add_product(request)
elif 'del_product' in request.POST['action']:
self.del_product(request)
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elif 'refill' in request.POST['action']:
self.refill(request)
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elif 'code' in request.POST['action']:
return self.parse_code(request)
elif 'cancel' in request.POST['action']:
return self.cancel(request)
elif 'finish' in request.POST['action']:
return self.finish(request)
context = self.get_context_data(object=self.object)
return self.render_to_response(context)
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def is_barman_price(self):
if self.customer.user.id in [s.id for s in Counter.get_barmen_list(self.object.id)]:
return True
else:
return False
def get_price(self, pid):
p = Product.objects.filter(pk=pid).first()
if self.is_barman_price():
price = p.special_selling_price
else:
price = p.selling_price
return price
def sum_basket(self, request):
total = 0
for pid,infos in request.session['basket'].items():
total += infos['price'] * infos['qty']
return total / 100
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def add_product(self, request, q = 1, p=None):
""" Add a product to the basket """
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pid = p or request.POST['product_id']
pid = str(pid)
price = self.get_price(pid)
total = self.sum_basket(request)
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if self.customer.amount < (total + q*float(price)):
request.session['not_enough'] = True
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return False
if pid in request.session['basket']:
request.session['basket'][pid]['qty'] += q
else:
request.session['basket'][pid] = {'qty': q, 'price': int(price*100)}
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request.session['not_enough'] = False # Reset not_enough to save the session
request.session.modified = True
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return True
def del_product(self, request):
""" Delete a product from the basket """
pid = str(request.POST['product_id'])
if pid in request.session['basket']:
request.session['basket'][pid]['qty'] -= 1
if request.session['basket'][pid]['qty'] <= 0:
del request.session['basket'][pid]
else:
request.session['basket'][pid] = 0
request.session.modified = True
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def parse_code(self, request):
"""Parse the string entered by the barman"""
string = str(request.POST['code']).upper()
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if string == _("END"):
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return self.finish(request)
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elif string == _("CAN"):
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return self.cancel(request)
regex = re.compile(r"^((?P<nb>[0-9]+)X)?(?P<code>[A-Z0-9]+)$")
m = regex.match(string)
if m is not None:
nb = m.group('nb')
code = m.group('code')
if nb is None:
nb = 1
else:
nb = int(nb)
p = Product.objects.filter(code=code).first()
if p is not None:
while nb > 0 and not self.add_product(request, nb, p.id):
nb -= 1
context = self.get_context_data(object=self.object)
return self.render_to_response(context)
def finish(self, request):
""" Finish the click session, and validate the basket """
if self.is_barman_price():
seller = self.customer.user
else:
seller = Counter.get_random_barman(self.object.id)
request.session['last_basket'] = []
for pid,infos in request.session['basket'].items():
# This duplicates code for DB optimization (prevent to load many times the same object)
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p = Product.objects.filter(pk=pid).first()
if self.is_barman_price():
uprice = p.special_selling_price
else:
uprice = p.selling_price
request.session['last_basket'].append("%d x %s" % (infos['qty'], p.name))
s = Selling(product=p, counter=self.object, unit_price=uprice,
quantity=infos['qty'], seller=seller, customer=self.customer)
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s.save()
request.session['last_customer'] = self.customer.user.get_display_name()
request.session['last_total'] = "%0.2f" % self.sum_basket(request)
request.session['new_customer_amount'] = str(self.customer.amount)
del request.session['basket']
request.session.modified = True
kwargs = {
'counter_id': self.object.id,
}
return HttpResponseRedirect(reverse_lazy('counter:details', args=self.args, kwargs=kwargs))
def cancel(self, request):
""" Cancel the click session """
kwargs = {'counter_id': self.object.id}
request.session.pop('basket', None)
return HttpResponseRedirect(reverse_lazy('counter:details', args=self.args, kwargs=kwargs))
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def refill(self, request):
"""Refill the customer's account"""
if self.is_barman_price():
operator = self.customer.user
else:
operator = Counter.get_random_barman(self.object.id)
form = RefillForm(request.POST)
if form.is_valid():
form.instance.counter = self.object
form.instance.operator = operator
form.instance.customer = self.customer
form.instance.save()
else:
self.refill_form = form
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def get_context_data(self, **kwargs):
""" Add customer to the context """
kwargs = super(CounterClick, self).get_context_data(**kwargs)
kwargs['customer'] = self.customer
kwargs['basket_total'] = self.sum_basket(self.request)
kwargs['refill_form'] = self.refill_form or RefillForm()
return kwargs
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class CounterLogin(RedirectView):
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"""
Handle the login of a barman
Logged barmen are stored in the class-wide variable 'barmen_session', in the Counter model
"""
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permanent = False
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def post(self, request, *args, **kwargs):
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"""
Register the logged user as barman for this counter
"""
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self.counter_id = kwargs['counter_id']
form = AuthenticationForm(request, data=request.POST)
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if form.is_valid():
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user = Subscriber.objects.filter(username=form.cleaned_data['username']).first()
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if user.is_subscribed():
Counter.add_barman(self.counter_id, user.id)
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else:
print("Error logging the barman") # TODO handle that nicely
return super(CounterLogin, self).post(request, *args, **kwargs)
def get_redirect_url(self, *args, **kwargs):
return reverse_lazy('counter:details', args=args, kwargs=kwargs)
class CounterLogout(RedirectView):
permanent = False
def post(self, request, *args, **kwargs):
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"""
Unregister the user from the barman
"""
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self.counter_id = kwargs['counter_id']
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Counter.del_barman(self.counter_id, request.POST['user_id'])
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return super(CounterLogout, self).post(request, *args, **kwargs)
def get_redirect_url(self, *args, **kwargs):
return reverse_lazy('counter:details', args=args, kwargs=kwargs)
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## Counter admin views
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class CounterListView(CanViewMixin, ListView):
"""
A list view for the admins
"""
model = Counter
template_name = 'counter/counter_list.jinja'
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class CounterEditView(CanEditMixin, UpdateView):
"""
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Edit a counter's main informations (for the counter's admin)
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"""
model = Counter
form_class = modelform_factory(Counter, fields=['name', 'club', 'type', 'products'],
widgets={'products':CheckboxSelectMultiple})
pk_url_kwarg = "counter_id"
template_name = 'counter/counter_edit.jinja'
class CounterCreateView(CanEditMixin, CreateView):
"""
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Create a counter (for the admins)
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"""
model = Counter
form_class = modelform_factory(Counter, fields=['name', 'club', 'type', 'products'],
widgets={'products':CheckboxSelectMultiple})
template_name = 'counter/counter_edit.jinja'
class CounterDeleteView(CanEditMixin, DeleteView):
"""
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Delete a counter (for the admins)
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"""
model = Counter
pk_url_kwarg = "counter_id"
template_name = 'core/delete_confirm.jinja'
success_url = reverse_lazy('counter:admin_list')
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# User accounting infos
class UserAccountView(DetailView):
"""
Display a user's account
"""
model = Customer
pk_url_kwarg = "user_id"
template_name = "counter/user_account.jinja"
def dispatch(self, request, *arg, **kwargs):
res = super(UserAccountView, self).dispatch(request, *arg, **kwargs)
if (self.object.user == request.user
or request.user.is_in_group(settings.SITH_GROUPS['accounting-admin']['name'])
or request.user.is_in_group(settings.SITH_GROUPS['root']['name'])):
return res
raise PermissionDenied
def get_context_data(self, **kwargs):
kwargs = super(UserAccountView, self).get_context_data(**kwargs)
kwargs['profile'] = self.object.user
# TODO: add list of month where account has activity
return kwargs
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